02_P31InstructorSolution - 2.31. Solve: (a) The...

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2.31. Solve: (a) The velocity-versus-time graph is given by the derivative with respect to time of the position function: 2 (6 18 )m/s x dx vt t dt == − For 0 m/s, x v = there are two solutions to the quadratic equation: t = 0 s and t = 3 s. (b) At the first of these solutions, 32 (at 0 s) 2(0 s) 9(0 s) 12 12 m xt
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